This from three days ago. Large forum site but not terribly good G traffic to begin with - only about 500/day UVs, been like that for a couple of years already. Slow but steady.
September 3rd - I'm starting a new G+ page for that site, adding link rel="publisher" to the header of all content pages and "Follow on G+" image button (both via template, so immediately sitewide). Why? FB traffic started to play a small but useful role and I just wanted to experiment with G+. There are 2 posts on that G+ page so far, all made that day. One has a link back to site (is that a crime? LOL)
September 4th - traffic drops to 90/day UVs and stays there.
Coincidence? Mods Note:
Keep your responses professional and productive. Off-topic posts and generic complaining will be deleted without notice.
[edited by: goodroi at 7:56 pm (utc) on Sep 6, 2013]